399229946 has 8 divisors (see below), whose sum is σ = 598938624. Its totient is φ = 199583740.

The previous prime is 399229937. The next prime is 399229951. The reversal of 399229946 is 649922993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6791 + ... + 29061.

It is an arithmetic number, because the mean of its divisors is an integer number (74867328).

Almost surely, 2^399229946 is an apocalyptic number.

399229946 is a deficient number, since it is larger than the sum of its proper divisors (199708678).

399229946 is a wasteful number, since it uses less digits than its factorization.

399229946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31236.

The product of its digits is 1889568, while the sum is 53.

The square root of 399229946 is about 19980.7393757088. The cubic root of 399229946 is about 736.3331787922. Note that the first 3 decimals are identical.

The spelling of 399229946 in words is "three hundred ninety-nine million, two hundred twenty-nine thousand, nine hundred forty-six".